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Ultrasensitive detection of amoxicillin by TiO2-g-C3N4@AuNPs impedimetric aptasensor: Fabrication, optimization, and mechanism.
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2020-01-27 , DOI: 10.1016/j.jhazmat.2020.122024
Jialing Song 1 , Manhong Huang 2 , Nan Jiang 1 , Shengyang Zheng 1 , Tianwei Mu 1 , Lijun Meng 1 , Yanbiao Liu 2 , Jianyun Liu 1 , Gang Chen 1
Affiliation  

The trace amount of antibiotics in water can be enriched in the human body through the food chain, leading to extremely harmful effects on people's health. Therefore, it is urgent to develop new methods to detect trace pollutants in various aquatic phase. An analytical method utilizing the synergistic effect between the sensing strategy and catalytic material with high electron transfer capacity can be used to detect trace antibiotics. In this paper, an ultrasensitive impedimetric aptasensor was fabricated by the synergy between functionalized materials (TiO2-g-C3N4) and gold nanoparticles (Au NPs). Due to the formation of the 'Au-S' bond between the thiol-aptamer and Au NPs, amoxicillin and the aptamer can be specifically recognized on the modified glassy carbon electrode (GCE), and the impedance signal increased rapidly. Meanwhile, the Box-Behnken Design (BBD) strategy was used to reduce the random error of the experiment, so that the prepared aptasensor has the highest sensitivity to the detection of amoxicillin. Under optimized conditions, the sensor successfully achieved the detection of amoxicillin in the ultra-low detection range (0.5-3 nM) and reached the ultra-low detection limit (0.2 nM). The detection strategy has good selectivity, reproducibility, and stability, and thus has good potential to detect amoxicillin in actual wastewater.

中文翻译:

TiO2-g-C3N4 @ AuNPs阻抗适体传感器对阿莫西林的超灵敏检测:制备,优化和机理。

水中的微量抗生素可以通过食物链富集到人体中,从而对人们的健康造成极其有害的影响。因此,迫切需要开发新的方法来检测各种水相中的痕量污染物。利用传感策略与具有高电子传递能力的催化材料之间的协同效应的分析方法可用于检测痕量抗生素。本文通过功能化材料(TiO2-g-C3N4)和金纳米颗粒(Au NPs)的协同作用制备了超灵敏阻抗适体传感器。由于在硫醇-适体和Au NP之间形成了“ Au-S”键,因此在修饰的玻碳电极(GCE)上可以特异性识别阿莫西林和适体,并且阻抗信号迅速增加。与此同时,采用Box-Behnken设计(BBD)策略来减少实验的随机误差,从而使所制备的适体传感器对阿莫西林的检测具有最高的灵敏度。在优化条件下,该传感器成功实现了阿莫西林的超低检测范围(0.5-3 nM)的检测,并达到了超低检测限(0.2 nM)。该检测策略具有良好的选择性,重现性和稳定性,因此具有检测实际废水中阿莫西林的良好潜力。5-3 nM)并达到超低检测极限(0.2 nM)。该检测策略具有良好的选择性,可重复性和稳定性,因此具有检测实际废水中阿莫西林的良好潜力。5-3 nM)并达到超低检测极限(0.2 nM)。该检测策略具有良好的选择性,重现性和稳定性,因此具有检测实际废水中阿莫西林的良好潜力。
更新日期:2020-01-27
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